Journal
MOLECULES
Volume 26, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/molecules26144303
Keywords
niobium diselenide; fiber laser; Q-switched; saturable absorber
Funding
- National Key Research and Development Program of China [2017YFB0405204]
- National Natural Science Foundation of China (NSFC) [61775119]
- Key Research and Development Program of Shandong Province [2017CXCC0808]
- Shenzhen Science and Technology Research and Development Funds [JCYJ 20180305163932273]
- Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices [KF201908]
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A saturable absorber (SA) based on niobium diselenide (NbSe2) was fabricated using optically driven deposition method, showing excellent nonlinear optical properties and successfully applied in a stable passively Q-switched erbium-doped all-fiber laser, achieving the shortest pulse duration and highest pulse energy ever reported for an NbSe2 SA in a Q-switched fiber laser.
A saturable absorber (SA) based on niobium diselenide (NbSe2), which is a layered transition metal dichalcogenide (TMD) in the VB group, is fabricated by the optically driven deposition method, and the related nonlinear optical properties are characterized. The modulation depth, saturable intensity, and nonsaturable loss of the as-prepared NbSe2 nanosheet-based SA are measured to be 16.2%, 0.76 MW/cm(2), and 14%, respectively. By using the as-fabricated NbSe2 SA, a highly stable, passively Q-switched, erbium-doped, all-fiber laser is realized. The obtained shortest pulse width is 1.49 mu s, with a pulse energy of 48.33 nJ at a center wavelength of 1560.38 nm. As far as we know, this is the shortest pulse duration ever obtained by an NbSe2 SA in a Q-switched fiber laser.
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